In spite of the significant developments seen in recent years,numerical modelin of Hydraulic Fracturing still poses major challenges due to the strong coupling between fluid flow and crack development,which is itself a ...

Microstructural and mineralogical observations of claystones reveal the presence of clay aggregates bonded by a
skeleton of inert minerals such as calcium carbonate. The behaviour of these natural materials evolves from ...

A finite-element simulation of the shear cutting process is used to predict thegeometry of the cutting surface. A fully-coupled Lemaitre-type model is used in the process model for the description of the material behaviour. ...

A general non-local approach to regularise strain-softening continua is presented.
The key idea is to introduce the gradient-type enrichment at the level of displacements (rather than some internal variable), so the model ...

This study presents methods for suppression of defects observed in zigzag bending of sheet-metal or plate. This type of bending is widely used in industry for manufacturing structural parts in automobiles. Although it is ...

In numerical analysis of geotechnical problems it is often necessary to use sophisticated elastoplastic constitutive models. Particularly, the presence of friction as the fundamental mechanism to dissipate energy provides ...

The strain rate intensity factor is the coefficient of the leading singular term in a series expansion of the equivalent strain rate in the vicinity of maximum friction surfaces. In the case of rigid perfectly plastic ...

The aim of this paper is to develop the PGD for time dependent elastoplastic problems with cyclic loadings. The objective is to show that the PGD can be well suited for simulating a ratchet effect by separating ...

The paper presents a derivation of the consistent tangent operator (CTO) for the class of iterative constitutive integration algorithms. The derivation is based on a variational analysis of algorithmic equations with respect ...

In this paper, a new constitutive law aiming at describing the quasi-brittle behavior when subjected to cyclic loading is presented.The proposed model is formulated with in the frame work of isotròpic contínuum damage ...

Constitutive parameters identification for elasto-plastic fracture is a complex problem due to the interplay between two forms of material nonlinearity, viz. plasticity and cohesive fracture. In the present study we examine ...

The complete derivation of the more exact solution that controlled the behaviour of reinforced concrete short rectangular column strengthened by steel lattice frame jacket is presented including the effect of bond slip ...

In this contribution we propose a numerical scheme for the incorporation of residual stresses inarterial walls.Throught he introduction of suitable stress in variants a local,time-independent residual stress tensor is ...